Lawrie: Tested
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Six players who were tested for drugs during the European Open two weeks ago all returned negative samples.
The sextet, who included former Open winner Paul Lawrie, were tested as part of the European Tour's new regime to help keep the sport 'clean'.
However, random testing will not take place this week as international qualifying started before the various education programmes had been fully embarked upon.
European Tour chief executive George O'Grady said: "We tested six players at the European Open, chosen from random, three from one half of the draw and three from the other. All six players were happy with the way it was done.
"We have said we're not going to discuss individual findings, more review at the end of the season. But in honour of the fact that this championship starts on Thursday, we asked for really fast-tracked testing procedures and the results are all negative.
"I think the players all understand why we have to do it. One is for the bid to get golf into the Olympics, and two is to keep the unprecedented image of professional golf. We strongly believe we are completely clean and we have to be seen to be clean now and prove it.
"We've had a widespread education process on supplements, the sorts of things everybody takes, not just sportsmen, and the same has gone on on the PGA Tour as well."
Last year's championship began amid allegations from Gary Player that he was certain the drug HGH was being used by players on the tour.
The first Major championship to be subject to testing will be next month's USPGA at Oakland Hills, while the Ryder Cup will also be subject to the new regime.
Meanwhile, R&A chief executive Peter Dawson believes the game of golf is on course to be included in the 2016 Olympics.
The International Golf Federation (IGF) has formed an Olympic committee to press for its inclusion in eight years' time.
"I think golf was not really speaking with one voice at the time and we were nowhere near as advanced as we are now with our anti-doping policies and so on," Dawson said.
"We visited the IOC (International Olympic Committee) in Lausanne recently and it was made pretty clear to us at that meeting that a bid from golf would be warmly welcomed by the IOC, so I think we're in much better shape.
"There are two vacancies projected in the Olympics in 2016 but we have six sports up against us - rugby sevens, squash, karate, roller sports, softball and
baseball.
"There is much to be done and stiff competition, but we do feel that we're putting together the right organisation to get the job done."
